Aching Pain at the Second Metatarsal Head with Walking or Prolonged Standing: Freiberg Disease (Second Metatarsal Head Osteochondrosis) Explained — Distinguishing It from Hallux Rigidus and Morton’s Neuroma, and Where Stem Cell Conditioned Media MTP Joint Injections Can Target Intra-Articular Inflammation but Cannot Restore Blood Flow to Necrotic Bone or Reverse Advanced Bony Deformity, by Dr. Moriwaki2026.08.10

When aching pain at the base of the second metatarsal persists for months with walking or prolonged standing, it is often dismissed as “just fatigue” — but this pain may not be hallux rigidus or Morton’s neuroma. It could be Freiberg disease (second metatarsal head osteochondrosis). This condition is a bone-necrotic disorder starting with impaired blood flow to the second metatarsal head, commonly seen in adolescent women, former dancers, and long-time high-heel wearers, progressing to secondary MTP joint arthritis. In this article, Dr. Moriwaki honestly explains this frequently overlooked forefoot pathology and clarifies what intra-articular environment can be addressed by stem cell conditioned media metatarsophalangeal joint injections — and what cannot, particularly the necrotic bone itself.

Key Points of This Article

・Freiberg disease originates from impaired blood flow and avascular necrosis in the epiphyseal region of the second metatarsal head, and if left untreated, tends to become chronic as secondary MTP joint arthritis.

・It differs from hallux rigidus (first MTP joint) and Morton’s neuroma (interdigital neuroma between the 3rd-4th toes) in both the location of pathology and the nature of pain; misdiagnosis leads to mismatched treatment planning.

・Stem cell conditioned media MTP joint injections can address intra-articular synovitis and cartilage metabolic environment, but do not restore blood flow to necrotic bone or reverse advanced bony deformity.

・The mainstays of conservative therapy are offloading, metatarsal pad insoles, footwear modification, and NSAIDs; conditioned media injection should honestly be positioned as an adjunct. Individual variation exists, and advanced cases require consideration of orthopedic surgery.

What Is Freiberg Disease — Selective Blood Flow Impairment in the Second Metatarsal Head

Freiberg disease, first reported in 1914 by Alfred H. Freiberg, is an avascular necrosis occurring in the epiphyseal region of the second (occasionally third) metatarsal head. It commonly affects women in their late teens — around the time growth plate closure occurs — and one anatomical background factor is that the second metatarsal is the longest of the five metatarsals and thus concentrates push-off stress on its head.

A Continuous Pathology from Osteochondrosis to Osteoarthritis

Initially, microvascular disruption within the head and weakening of bone quality occur, with radiographs showing flattening of the head and subchondral lucency. As it progresses, the head becomes flattened and fragmented, the joint surface deteriorates, and it transitions to secondary MTP joint arthritis. At this stage, the pain changes character from “sharp with movement” to “constant, deep aching.”

Typical Backgrounds and Lifestyle History

Athletic activities during adolescence, repeated toe-standing in dance and ballet, heavy loading of the second metatarsal head from prolonged high-heel use, and later reactivation in middle age — these form the typical course. Pain in youth is often dismissed as “growing pains,” only to return in the 40s-60s as secondary MTP joint arthritis at follow-up visits.

Distinguishing Freiberg Disease from Easily Confused Conditions: Hallux Rigidus and Morton’s Neuroma

Although forefoot pain complaints may sound similar, when the location of the causative pathology differs, treatment strategy differs entirely. This condition is a problem on the “bony side of the joint” at the second metatarsal head, whereas other representative forefoot pathologies are fundamentally different.

Differences from Hallux Rigidus

Hallux rigidus is characterized primarily by joint space narrowing at the first MTP joint and dorsal osteophytes limiting dorsiflexion range of motion, with pain at the base of the great toe during push-off. This condition manifests pain at the second metatarsal head (base of the second toe), one toe outward.

Differences from Morton’s Neuroma

Morton’s neuroma is an entrapment neuropathy of the common plantar digital nerve between the 3rd-4th toes, with typical neuralgic symptoms described as “numbness” or “electric shock-like.” This condition, being joint and bony pain, has a dull, heavy quality described as “aching” or “throbbing,” usually without numbness. Clinical differentiation is also possible through direct tenderness upon palpation of the second metatarsal head and the presence or absence of Mulder’s click.

What Stem Cell Conditioned Media MTP Injections Can and Cannot Target

As explained in our detailed page on stem cell conditioned media joint injections, conditioned media contains diverse growth factors, cytokines, and exosomes, with reports suggesting potential action on intra-articular inflammatory cycles and cartilage metabolic environments. What MTP joint injections for Freiberg disease can address is strictly the layer of “correcting the intra-articular inflammatory environment.”

Addressable Pathology — Secondary Synovitis and Intra-Articular Inflammatory Cycle

When deformity of the metatarsal head creates joint surface irregularity, inflammatory cytokines (IL-1β, TNF-α, etc.) in the synovial fluid increase, and a chronic synovitis cycle becomes established. At the stage where this inflammatory environment amplifies persistent pain, there is clinical significance in targeting an anti-inflammatory shift through stem cell conditioned media MTP joint injection.

Non-Addressable Pathology — Restoring Blood Flow to Necrotic Bone and Bony Morphological Changes

On the other hand, conditioned media cannot perform structural interventions such as “restoring blood flow to necrotic bone within the head” or “returning a flattened head to its original shape.” For advanced cases with high-grade joint destruction, orthopedic surgeries such as Weil osteotomy or arthroplasty become the appropriate indication. For comprehensive information on joint diseases, please also refer to the Japanese Orthopaedic Association.

Positioning Within Overall Conservative Therapy

The cornerstone of conservative therapy for this condition is “reducing load on the second metatarsal head.” Supporting the forefoot transverse arch with metatarsal pad insoles, avoiding high-heeled shoes, and temporarily restricting high-activity exercise form the fundamentals of treatment. NSAIDs are used for pain control during acute exacerbations. On top of this foundation, for cases where stubborn pain from chronic synovitis persists, stem cell conditioned media MTP joint injection should be considered as an adjunct option. Effects vary individually, and comparative evaluation with orthopedic surgery becomes necessary in end-stage cases.

Frequently Asked Questions

Q. Does Freiberg disease heal on its own?

In early, mild cases, symptoms may settle over several months to about a year with offloading and insole use. However, if head deformity has progressed, the structure does not return to normal through natural history, and chronic pain often remains.

Q. Can conditioned media MTP joint injections cure the osteonecrosis itself?

No. Conditioned media acts on the intra-articular inflammatory environment; it does not restore blood flow to necrotic bone within the metatarsal head or return a flattened head to its original shape. What can be targeted is strictly correction at the level of intra-articular synovitis.

Q. What ages does it typically affect?

Initial onset commonly occurs in women in their late teens, but many patients return in their 40s-60s with secondary MTP joint arthritis. It is frequently encountered in middle-aged women who have long-worn high heels, former dancers, and former track athletes.

Q. Should I choose surgery or regenerative medicine?

The answer depends on the degree of progression and impairment of daily activities. When joint destruction is severe and walking is impaired, Weil osteotomy, arthroplasty, or similar procedures are considered. In mild to moderate cases where chronic inflammation is the primary source of pain, conservative therapy including conditioned media injection remains an option. This is a question to be decided based on orthopedic imaging diagnosis.

Q. How long do the effects of conditioned media injections last?

Duration of effect varies individually and also depends on the degree of osteonecrosis progression. Some patients feel effects lasting several months, while others show poor response. It is important to hold reasonable expectations and follow the course while combining with other conservative therapies.

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【Supervisor】Shin Moriwaki, M.D. (Supervising Physician)

Member of the Japan Society of Aesthetic Surgery (JSAS) / Member of the American Academy of Aesthetic Medicine

ECFMG Certificate

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